I'm looking for suggestions about choosing a portable way to achieve local IPC in a robust way, since i'm new to C++ and would like to avoid common pitfalls of fiddling with shared memory and locks; therefore I was thinking about message-passing style ipc.
I was planning to use qt for other reasons anyway, thus i took a peek to Qt ipc options.
if i understand correctly qt doesn't offer a completely portable message-passing ipc feature. it can use d-bus, but using it on windows would be a problem. other ways are limited to embedded linux platforms (and i would like to port this thing to AIX).
I could not find a "signal and slots" or message-passing style implementation that uses QSharedMemory and QSystemSemaphores
Thus: Am I limited to implement a feature on QSM/QSS? what other options could i study? posix pipes? protocol buffers? boost queues and messages ?
I'm considering to release the code under LGPL/GPL style license, does this rule out protocol buffers or boost libs?
please, again, the interface must be simple and newbie-proof (otherwise i definitely will screw up things big time for sure :) ), and so should the serialization/deserialization of types, error handling and resource disposal.
Take a look at Boost.Interprocess which provides a lot of IPC functionality. I have used the interprocess message_queue that provides a pretty clean and easy way to do what I think you want to do.
You can use QLocalSocket and QlocalServer for IPC too. Those two classes are really easy to use and they can be implemented ~almost the same way as you would using Qt TCP socket client/server.
You can take a look at some of these youtube videos:
QTCPServer - a basic TCP server application
QTcpServer using multiple threads
(Almost the sames principles would apply for "Local" server/client instead of "TCP")
As Qt 5.9, there is module which is currently under technology preview name QtRemoteObjects which provides Qt native IPC for QObjects, its easy to use and could be used to share signal/slots and also models between two processes.
Its works well for Linux, Windows and android
来源：https://stackoverflow.com/questions/1717540/qt-portable-ipc-only-qsharedmemory